ID:176099 Synchronization register <name> for differential I/O pin <name> must be in same row and within <number> LABs of node

CAUSE: You assigned the specified synchronization register for the specified differential I/O pin to a location that may affect the performance of the design. The synchronization register must be in the same row and within the specified number of LABs of the differential I/O pin.

ACTION: Delete the location assignment, or change the synchronization register location assignment so that the synchronization register is in the same row and within the specified number of LABs of the differential I/O pin.